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Relgaabi (Gabapentin): Uses, Side Effects and Dosage

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400 mg, 300 mg, 200 mg
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Source: FDA drug labeling via NLM DailyMed · About this document

Patient information: uses, side effects, how to take - Relgaabi

What is the most important information I should know about RELGAABI?

Do not stop taking RELGAABI without first talking to your healthcare provider. Stopping RELGAABI suddenly can cause serious problems.

RELGAABI can cause serious side effects including:

  1. 1. Suicidal Thoughts. Like other antiepileptic drugs, RELGAABI may cause suicidal thoughts or actions in a very small number of people, about 1 in 500. This can happen while you take RELGAABI as well as after stopping RELGAABI.

Call a healthcare provider right away if you have any of these symptoms, especially if they are new, worse, or worry you:

  • thoughts about suicide or dying
  • attempts to commit suicide
  • new or worse depression
  • new or worse anxiety
  • feeling agitated or restless
  • panic attacks
  • trouble sleeping (insomnia)
  • new or worse irritability
  • acting aggressive, being angry, or violent
  • acting on dangerous impulses
  • an extreme increase in activity and talking (mania)
  • other unusual changes in behavior or mood

How can I watch for early symptoms of suicidal thoughts and actions?

  • Pay attention to any changes, especially sudden changes, in mood, behaviors, thoughts, or feelings.
  • Keep all follow-up visits with your healthcare provider as scheduled.

Call your healthcare provider between visits as needed, especially if you are worried about symptoms.

Do not stop taking RELGAABI without first talking to a healthcare provider.

  • Stopping RELGAABI suddenly can cause serious problems. Stopping a seizure medicine suddenly in a person who has epilepsy can cause seizures that will not stop (status epilepticus).
  • Suicidal thoughts or actions can be caused by things other than medicines. If you have suicidal thoughts or actions, your healthcare provider may check for other causes.
  • Changes in behavior and thinking. Using RELGAABI in children 3 to 12 years of age can cause emotional changes, aggressive behavior, problems with concentration, changes in school performance, restlessness, and hyperactivity.
  • RELGAABI may cause serious or life-threatening allergic reactions that may affect your skin or other parts of your body such as your liver or blood cells. This may cause you to be hospitalized or to stop RELGAABI. You may or may not have a rash with an allergic reaction caused by RELGAABI. Call a healthcare provider right away if you have any of the following symptoms:
  • skin rash
  • hives
  • difficulty breathing
  • fever
  • swollen glands that do not go away
  • swelling of your face, lips, throat, or tongue
  • yellowing of your skin or of the whites of the eyes
  • unusual bruising or bleeding
  • severe fatigue or weakness
  • unexpected muscle pain
  • frequent infections

These symptoms may be the first signs of a serious reaction. A healthcare provider should examine you to decide if you should continue taking RELGAABI.

4. Serious breathing problems.

Serious breathing problems can happen when RELGAABI is taken with other medicines (such as opioid pain medicines) that can cause severe sleepiness or decreased awareness, or when it is taken by someone who already has breathing problems. Call your healthcare provider or get medical help right away if you have any of the following symptoms:

  • feel short of breath
  • feel very tired
  • dizziness
  • breathing slower than normal
  • confusion
  • headache

Be sure that your caregiver or family members know which symptoms may be serious so they can call your healthcare provider or get medical help if you are unable to seek treatment on your own.

Your healthcare provider may lower your dose or stop your treatment with RELGAABI if you have serious breathing problems.

What is RELGAABI?

RELGAABI is a prescription medicine used to treat:

  • pain from damaged nerves (postherpetic pain) that follows healing of shingles (a painful rash that comes after a herpes zoster infection) in adults.
  • partial seizures when taken together with other medicines in adults and children 3 years of age and older with seizures. It is not known if RELGAABI is safe and effective to treat:
  • children with pain from damaged nerves from a painful rash caused by the chicken pox virus.

  • partial seizures in children under 3 years of age.

Do not take RELGAABI if you:

  • are allergic to gabapentin or any of the other ingredients in RELGAABI.

See the end of this Medication Guide for a complete list of ingredients in RELGAABI.

Before taking RELGAABI, tell your healthcare provider about all of your medical conditions including if you:

  • have or have had kidney problems or are on hemodialysis.
  • have or have had depression, mood problems, or suicidal thoughts or behavior.
  • have a history of drug abuse.
  • have diabetes.
  • have breathing problems.

  • are pregnant or plan to become pregnant. It is not known if RELGAABI can harm your unborn baby. Tell your healthcare provider right away if you become pregnant while taking RELGAABI. You and your healthcare provider will decide if you should take RELGAABI while you are pregnant.

  • are breastfeeding or plan to breastfeed. RELGAABI can pass into breast milk. You and your healthcare provider should decide how you will feed your baby while you take RELGAABI.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

Especially tell your healthcare provider if you take:

  • any opioid pain medicine such as morphine, hydrocodone, oxycodone, or buprenorphine.
  • any medicines for anxiety (such as lorazepam) or insomnia (such as zolpidem), or any medicines that make you sleepy. You may have a higher chance for dizziness, sleepiness, or breathing problems if these medicines are taken with RELGAABI.

Taking RELGAABI with certain other medicines can cause side effects or affect how well they work. Do not start or stop other medicines without talking to your healthcare provider.

Know the medicines you take. Keep a list of them and show it to your healthcare provider and pharmacist when you get a new medicine.

How should I take RELGAABI?

  • Take RELGAABI exactly as prescribed. Your healthcare provider will tell you how much RELGAABI to take.
  • Do not change your dose of RELGAABI without talking to your healthcare provider.
  • Do not stop taking RELGAABI without talking to your healthcare provider first. If you stop taking RELGAABI suddenly, you may develop side effects.

  • RELGAABI can be taken with or without food.

  • Swallow RELGAABI capsules whole with water.
  • If you take an antacid containing aluminum and magnesium, such as Maalox, Mylanta, Gelusil, Gaviscon, or Di-Gel, you should wait at least 2 hours before taking your next dose of RELGAABI.
  • In case of overdose, get medical help or contact a live Poison Center expert right away at 1-800-222-1222. Advice is also available online at poisonhelp.org.

What should I avoid while taking RELGAABI?

  • Do not drink alcohol or take other medicines that make you sleepy or dizzy while taking RELGAABI without first talking with your healthcare provider. Taking RELGAABI with alcohol or drugs that cause sleepiness or dizziness may make your sleepiness or dizziness worse.
  • Do not drive, operate heavy machinery, or do other dangerous activities until you know how RELGAABI affects you. RELGAABI can slow your thinking and motor skills.

What are the possible side effects of RELGAABI?

RELGAABI may cause serious side effects, including:

  • See “What is the most important information I should know about RELGAABI?”
  • problems driving while using RELGAABI. See “What should I avoid while taking RELGAABI?”
  • sleepiness and dizziness, which could increase your chance of having an accidental injury, including falls.

The most common side effects of RELGAABI include:

  • lack of coordination
  • feeling drowsy
  • viral infection
  • nausea and vomiting
  • difficulty with speaking
  • jerky movements
  • tremor
  • difficulty with coordination
  • swelling, usually of legs and feet
  • double vision
  • feeling tired
  • unusual eye movement
  • fever

Tell your healthcare provider if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of RELGAABI. For more information, ask your healthcare provider or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

How should I store RELGAABI?

Store RELGAABI capsules at room temperature between 68°F to 77°F (20°C to 25°C).

Keep RELGAABI and all medicines out of the reach of children.

General information about the safe and effective use of RELGAABI.

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use RELGAABI for a condition for which it was not prescribed. Do not give RELGAABI to other people, even if they have the same symptoms that you have. It may harm them.

You can ask your pharmacist or healthcare provider for information about RELGAABI that is written for health professionals.

What are the ingredients in RELGAABI?

Active ingredient: gabapentin USP

Inactive ingredients in the capsules: Pregelatinized starch (maize) and talc.

The 100-mg capsule shell also contains: gelatin, sodium lauryl sulfate (SLS), titanium dioxide.

The 200-mg capsule shell also contains gelatin, titanium dioxide, black and yellow iron oxide.

The 300-mg capsule shell also contains: gelatin, titanium dioxide, FD&C Red 40, D&C Yellow 10, and sodium lauryl sulfate (SLS).

The 400-mg capsule shell also contains: gelatin, titanium dioxide, sodium lauryl sulfate (SLS), D&C Yellow 10, and FD&C Red 40.

The imprinting ink contains shellac, dehydrated alcohol, isopropyl alcohol, butyl alcohol, propylene glycol, strong ammonia solution, black iron oxide, and potassium hydroxide.

This Medication Guide has been approved by the U.S. Food and Drug Administration.

All brands listed are the trademarks of their respective owners.

Manufactured by:

ScieGen Pharmaceuticals, Inc.

Hauppauge, NY 11788

Manufactured for:

Method Pharmaceuticals

Southlake, TX 76092

Revised: 3/2026

About this document

Source: FDA drug labeling via NLM DailyMed · Application number: ANDA 204989 · View the label on DailyMed

Revision date stated in the text: March 2026

Found a mistake? Write to us via the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Relgaabi

Rx or OTC
Prescription (Rx)?
  • This drug is available only with a prescription from a licensed healthcare provider.
  • Rx
Drug class Anti-epileptic Agent
Active ingredient Gabapentin
Dosage form Capsule
Route Oral
Marketing status listed in the FDA NDC Directory
Company (applicant) SCIEGEN PHARMS
FDA approval ANDA 204989Abbreviated New Drug Application (ANDA) – generic drug Approved February 18, 2016
Therapeutic equivalence (TE) code ABCodes starting with A mean the FDA rates the drug therapeutically equivalent to its reference drug (Orange Book).
Generics Gabapentin, Neurontin with the same TE code
Manufacturers 1 labelers list this drug on DailyMed
Packages (NDC)
Package
400 mg – 100 in 1 bottle, plastic NDC 58657-234-01
300 mg – 100 in 1 bottle, plastic NDC 58657-233-01
200 mg – 100 in 1 bottle, plastic NDC 58657-231-01

Source: FDA drug labeling via NLM DailyMed, data as of October 31, 2026. FDA data (DailyMed, Orange Book, Drug Shortages, enforcement reports). Not a substitute for the advice of a doctor or pharmacist.